# This file is part of the MicroPython project, http://micropython.org/
#
# The MIT License (MIT)
#
# Copyright (c) 2019 Dan Halbert for Adafruit Industries
# Copyright (c) 2019 Lucian Copeland for Adafruit Industries
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.

# Select the board to build for.
ifeq ($(BOARD),)
$(error You must provide a BOARD parameter)
else
ifeq ($(wildcard boards/$(BOARD)/.),)
$(error Invalid BOARD specified)
endif
endif

# If the build directory is not given, make it reflect the board name.
BUILD ?= build-$(BOARD)

include ../../py/mkenv.mk
# Board-specific
include boards/$(BOARD)/mpconfigboard.mk
# Port-specific
include mpconfigport.mk

# CircuitPython-specific
include $(TOP)/py/circuitpy_mpconfig.mk

# qstr definitions (must come before including py.mk)
QSTR_DEFS = qstrdefsport.h

# include py core make definitions
include $(TOP)/py/py.mk

include $(TOP)/supervisor/supervisor.mk

# Include make rules and variables common across CircuitPython builds.
include $(TOP)/py/circuitpy_defns.mk

CROSS_COMPILE = arm-none-eabi-

MCU_SERIES_LOWER = $(shell echo $(MCU_SERIES) | tr '[:upper:]' '[:lower:]')
MCU_VARIANT_LOWER = $(shell echo $(MCU_VARIANT) | tr '[:upper:]' '[:lower:]')

HAL_DIR=st_driver/STM32$(MCU_SERIES)xx_HAL_Driver

INC += -I.
INC += -I../..
INC += -I$(BUILD)
INC += -I$(BUILD)/genhdr
INC += -I./$(HAL_DIR)/Inc
INC += -I./$(HAL_DIR)/Inc/Legacy
INC += -I./st_driver/CMSIS/Device/ST/STM32$(MCU_SERIES)xx/Include
INC += -I./st_driver/CMSIS/Include
INC += -I./boards
INC += -I./boards/$(BOARD)
INC += -I./hal_conf
INC += -I./peripherals
INC += -I./packages
INC += -I../../lib/mp-readline
INC += -I../../lib/tinyusb/src
INC += -I../../supervisor/shared/usb

#Debugging/Optimization
ifeq ($(DEBUG), 1)
	CFLAGS += -ggdb
	# You may want to enable these flags to make setting breakpoints easier.
	CFLAGS += -fno-inline -fno-ipa-sra
else
	CFLAGS += -Os -DNDEBUG
	CFLAGS += -ggdb
	# TODO: Test with -flto
	# CFLAGS += -flto
endif

# MCU Series is defined by the HAL package and doesn't need to be specified here
C_DEFS = -D$(MCU_PACKAGE) -DUSE_HAL_DRIVER -DUSE_FULL_LL_DRIVER -D$(MCU_VARIANT)

CFLAGS += $(INC) -Werror -Wall -std=gnu11 -fshort-enums $(BASE_CFLAGS) $(C_DEFS) $(CFLAGS_MOD) $(COPT) -nostdlib -nostartfiles

# Undo some warnings.
# STM32 HAL uses undefined preprocessor variables, shadowed variables, casts that change alignment reqs
CFLAGS += -Wno-undef -Wno-shadow -Wno-cast-align

CFLAGS += -mthumb -mabi=aapcs-linux

# Arm core selection
MCU_FLAGS_F4 = -mcpu=cortex-m4
MCU_FLAGS_F7 = -mcpu=cortex-m7
MCU_FLAGS_H7 = -mcpu=cortex-m7
CFLAGS += $(MCU_FLAGS_$(MCU_SERIES))

# Select HAL file for distribution via mpconfigport
CFLAGS += -DSTM32_HAL_H='<stm32$(MCU_SERIES_LOWER)xx_hal.h>'

CFLAGS += -DSTM32_SERIES_LOWER='"stm32$(MCU_SERIES_LOWER)"'

# Floating point settings
ifeq ($(MCU_VARIANT),$(filter $(MCU_VARIANT),STM32F765xx STM32F767xx STM32F769xx STM32H743xx))
CFLAGS += -mfpu=fpv5-d16 -mfloat-abi=hard
else
CFLAGS += -mfpu=fpv4-sp-d16 -mfloat-abi=hard
endif

# Need both command and valid file to use uf2 bootloader
ifndef LD_FILE
    ifneq ($(and $(UF2_BOOTLOADER),$(LD_BOOT)),)
        LD_FILE = $(LD_BOOT)
        BOOTLOADER_OFFSET = $(UF2_OFFSET)
        CFLAGS += -DUF2_BOOTLOADER_ENABLED
    else
        LD_FILE = $(LD_DEFAULT)
    endif
endif

# Add bootloader specific items
ifndef BOOTLOADER_OFFSET
	BOOTLOADER_OFFSET := 0x8000000
endif

LDFLAGS = $(CFLAGS) -Wl,-nostdlib -Wl,-T,$(LD_FILE) -Wl,-T,$(LD_COMMON) -Wl,-Map=$@.map -Wl,-cref -Wl,-gc-sections -specs=nano.specs
LIBS := -lgcc -lc

# Use toolchain libm if we're not using our own.
ifndef INTERNAL_LIBM
LIBS += -lm
endif

# TinyUSB defines
CFLAGS += \
	-DCFG_TUSB_MCU=OPT_MCU_STM32$(MCU_SERIES) \
	-DCFG_TUD_CDC_RX_BUFSIZE=1024 \
	-DCFG_TUD_CDC_TX_BUFSIZE=1024 \
	-DCFG_TUD_MSC_BUFSIZE=4096 \
	-DCFG_TUD_MIDI_RX_BUFSIZE=128 \
	-DCFG_TUD_MIDI_TX_BUFSIZE=128

SRC_STM32 = $(addprefix $(HAL_DIR)/Src/stm32$(MCU_SERIES_LOWER)xx_,\
	hal_adc.c \
	hal_adc_ex.c \
	hal_dac.c \
	hal_dac_ex.c \
	hal_i2c.c \
	hal_i2c_ex.c \
	hal_qspi.c \
	hal_rng.c \
	hal_rtc.c \
	hal_rtc_ex.c \
	hal_spi.c \
	hal_tim.c \
	hal_tim_ex.c \
	hal_uart.c \
	hal_usart.c \
	hal_rcc.c \
	hal_rcc_ex.c \
	hal_flash.c \
	hal_flash_ex.c \
	hal_gpio.c \
	hal_dma_ex.c \
	hal_dma.c \
	hal_pwr.c \
	hal_pwr_ex.c \
	hal_cortex.c \
	hal.c \
	hal_exti.c \
	hal_sd.c \
	ll_gpio.c \
	ll_adc.c \
	ll_i2c.c \
	ll_dma.c \
	ll_sdmmc.c \
	ll_usart.c \
	ll_rcc.c \
	ll_utils.c \
	ll_exti.c \
)

# Need this to avoid UART linker problems. TODO: rewrite to use registered callbacks.
# Does not exist for F4 and lower
ifeq ($(MCU_VARIANT),$(filter $(MCU_VARIANT),STM32F765xx STM32F767xx STM32F769xx STM32H743xx))
	SRC_STM32 += $(HAL_DIR)/Src/stm32$(MCU_SERIES_LOWER)xx_hal_uart_ex.c
endif

SRC_STM32 += boards/system_stm32$(MCU_SERIES_LOWER)xx.c

SRC_C += \
	background.c \
	fatfs_port.c \
	mphalport.c \
	boards/$(BOARD)/board.c \
	boards/$(BOARD)/pins.c \
	peripherals/stm32$(MCU_SERIES_LOWER)/clocks.c \
	peripherals/stm32$(MCU_SERIES_LOWER)/$(MCU_VARIANT_LOWER)/pins.c \
	peripherals/stm32$(MCU_SERIES_LOWER)/$(MCU_VARIANT_LOWER)/gpio.c \
	peripherals/stm32$(MCU_SERIES_LOWER)/$(MCU_VARIANT_LOWER)/periph.c \
	packages/$(MCU_PACKAGE).c \
	lib/libc/string0.c \
	lib/mp-readline/readline.c \
	lib/oofatfs/ff.c \
	lib/oofatfs/option/ccsbcs.c \
	lib/timeutils/timeutils.c \
	lib/utils/buffer_helper.c \
	lib/utils/context_manager_helpers.c \
	lib/utils/interrupt_char.c \
	lib/utils/pyexec.c \
	lib/utils/stdout_helpers.c \
	lib/utils/sys_stdio_mphal.c \
	supervisor/shared/memory.c

ifneq ($(USB),FALSE)
SRC_C += lib/tinyusb/src/portable/st/synopsys/dcd_synopsys.c
endif

SRC_S = \
	supervisor/cpu.s \
	st_driver/CMSIS/Device/ST/STM32$(MCU_SERIES)xx/Source/Templates/gcc/startup_$(MCU_VARIANT_LOWER).s

SRC_COMMON_HAL_EXPANDED = $(addprefix shared-bindings/, $(SRC_COMMON_HAL)) \
						  $(addprefix shared-bindings/, $(SRC_BINDINGS_ENUMS)) \
						  $(addprefix common-hal/, $(SRC_COMMON_HAL))

SRC_SHARED_MODULE_EXPANDED = $(addprefix shared-bindings/, $(SRC_SHARED_MODULE)) \
							 $(addprefix shared-module/, $(SRC_SHARED_MODULE)) \
							 $(addprefix shared-module/, $(SRC_SHARED_MODULE_INTERNAL))


ifneq ($(FROZEN_MPY_DIR),)
FROZEN_MPY_PY_FILES := $(shell find -L $(FROZEN_MPY_DIR) -type f -name '*.py')
FROZEN_MPY_MPY_FILES := $(addprefix $(BUILD)/,$(FROZEN_MPY_PY_FILES:.py=.mpy))
endif

OBJ += $(PY_O) $(SUPERVISOR_O) $(addprefix $(BUILD)/, $(SRC_C:.c=.o))
OBJ += $(addprefix $(BUILD)/, $(SRC_STM32:.c=.o))
OBJ += $(addprefix $(BUILD)/, $(SRC_COMMON_HAL_EXPANDED:.c=.o))
OBJ += $(addprefix $(BUILD)/, $(SRC_SHARED_MODULE_EXPANDED:.c=.o))
ifeq ($(INTERNAL_LIBM),1)
OBJ += $(addprefix $(BUILD)/, $(SRC_LIBM:.c=.o))
endif
OBJ += $(addprefix $(BUILD)/, $(SRC_S:.s=.o))
OBJ += $(addprefix $(BUILD)/, $(SRC_MOD:.c=.o))

$(BUILD)/$(FATFS_DIR)/ff.o: COPT += -Os
$(filter $(PY_BUILD)/../extmod/vfs_fat_%.o, $(PY_O)): COPT += -Os

# List of sources for qstr extraction
SRC_QSTR += $(SRC_C) $(SRC_SUPERVISOR) $(SRC_MOD) $(SRC_COMMON_HAL_EXPANDED) $(SRC_SHARED_MODULE_EXPANDED)
# Sources that only hold QSTRs after pre-processing.
SRC_QSTR_PREPROCESSOR +=

# Bin section settings specific to the STM32H7
ifeq ($(MCU_VARIANT),$(filter $(MCU_VARIANT),STM32H743xx))
MCU_SECTIONS = -j .isr_vector -j .text -j .data -j .itcm -j .dtcm_data $^ $@
else
MCU_SECTIONS = $^ $@
endif

all: $(BUILD)/firmware.bin $(BUILD)/firmware.uf2

$(BUILD)/firmware.elf: $(OBJ)
	$(STEPECHO) "LINK $@"
	$(Q)$(CC) -o $@ $(LDFLAGS) $^ -Wl,--start-group $(LIBS) -Wl,--end-group
	$(Q)$(SIZE) $@ | $(PYTHON3) $(TOP)/tools/build_memory_info.py $(LD_FILE)

$(BUILD)/firmware.bin: $(BUILD)/firmware.elf
	$(STEPECHO) "Create $@"
	$(Q)$(OBJCOPY) -O binary $(MCU_SECTIONS)

$(BUILD)/firmware.hex: $(BUILD)/firmware.elf
	$(STEPECHO) "Create $@"
	$(Q)$(OBJCOPY) -O ihex $(MCU_SECTIONS)

$(BUILD)/firmware.uf2: $(BUILD)/firmware.hex
	$(ECHO) "Create $@"
	$(PYTHON3) $(TOP)/tools/uf2/utils/uf2conv.py -f 0x57755a57 -b $(BOOTLOADER_OFFSET) -c -o "$(BUILD)/firmware.uf2" $^

flash: $(BUILD)/firmware.bin
	$(ECHO) "Writing $< to the board"
	dfu-util -a 0 --dfuse-address 0x08000000 -D $(BUILD)/firmware.bin

include $(TOP)/py/mkrules.mk

# Print out the value of a make variable.
# https://stackoverflow.com/questions/16467718/how-to-print-out-a-variable-in-makefile
print-%:
	@echo $* = $($*)
